... 500-1000m / m.2. accumulation of light weight, high strength, low energy consumption to backwash, head loss, loss of head ... .851.87Density(g/m3)2.43.37Strength(MPa)≤40Minimum compressive strength of single grain≥200Floating grain rate(%)<10Void(%)20~48Acid ... volume, surface area, high porosity, good chemical stability.High strength, acid and alkali, smooth surface, conductivity and stability, long ...